{
  "id": 848296,
  "title": "I Asked Claude Code to Find Me a Trading Edge. It Killed Three Strategies First.",
  "url": "https://urgent.news/2026/08/14/i-asked-claude-code-to-find-me-a-trading-edge-it-killed-three",
  "topic": "ai",
  "section": "AI",
  "published": "2026-08-14T07:26:03.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/hidenari/i-asked-claude-code-to-find-me-a-trading-edge-it-killed-three-strategies-first-22ai"
  },
  "original_language": "en",
  "account": "Author Claude Code tasked with finding trading edge in Japanese stocks, but it killed three strategies first. The AI was limited to four functions: data structuring, computing metrics, checking facts against rules, and explaining results. Claude Code built a data pipeline using J-Quants API, backtested strategies with Python and pandas, and ran daily tracking jobs with launchd.\n\nRound 1: Technical strategies were implemented, but they underperformed against the benchmark, resulting in dead strategies. Round 2: Earnings drift (PEAD) was tested but found nothing, with a single filter removing the edge. Round 3: Small-cap value × quality strategy survived, returning +8.89% per quarter when ranked by valuation and quality guards. This strategy survived the liquidity filter, outperforming the universe average. The author then ran a paper portfolio using the surviving strategy, which was tracked automatically every trading day without touching parameters.",
  "summary": "How I built a fully automated, rule-based Japanese stock research pipeline with Claude Code, J-Quants, and a macOS cron job — and why \"the AI is not allowed to predict anything\" turned out to be the most useful constraint in the whole project. Everyone's first idea for \"AI + stocks\" is the same: ask the model whether a stock will go up. That idea has been tested, and it fails — LLMs guessing…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}